Electric alarm-clock



(No Model.) v

E. J. COLBY.

ELECTRIC ALARM CLOCK.

No. 370,932. I Patented 0015-. '4, 1887.

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EDWARD J. COLBY, OF CHICAGO, ILLINOIS.

ELECTRIC ALARM-CLOCK.

SPECIFICATION forming part of Letters Patent No. 370,932, dated October 4, 1887.

Application filed February 23, 1887. Serial No. 228.474.

T 0 aZZ whom it may concern.-

Be it known that I, EDWARD J. COLBY, a citizen of the United States, residing at Ohicago, in the county of Cook and State of Illinois, have invented a new and useful Electric Alarm-Clock, of which the followingisa specification.

My invention relates to ordinary alarmclocks, and has for its object to provide means whereby they may be utilized to close the circuit of an electric battery, and thus cause an electric bell to ring. This object I accomplish by means of the mechanism illustrated in the accompanying drawing, wherein the figure shows the front view of a bell, battery, and ordinary small alarm-clock, with a sectional view through the bell thereof.

A is a bell placed at any convenient locality.

B is a battery, and O is the clock.

D is a wire which passes through one leg of the clock to the bell.

E is a wire passing from the battery to the electric bell.

F'is a wire passing from the battery to the bell on the alarm-clock.

G is the sounding portion of the alarm-clock bell, having an inner tubular portion, H,wit.h a raised ledge, J, thereon.

K is a hammer on the alarmclock bell.

L is the bell-supporting stem issuing from the top of the alarmclock. Mis a ring whereby such clock may be carried, and it is secured by the screw-threads N to the stem L.

O is a cylinder of insulating material which is placed about the stem L. P is a washer of the same material at the base of the cylindrical portion 0, bearing on the metallic body of the clock 0. I

Q is a small washer at the top of the cylinder, lying between the stem R and the sounding portion of the bell G.

The use and operation of my invention are as follows: The clock is set up in the position shown in the drawing, and any .number of bells A may be attached thereto, and they may be located in any position. Thus, for instance, if it is desired to use one alarm-clock for the purpose of arousing all of the occupants of a building, it may be done by placing one bell in each sleeping-room and connecting all such bells to the circuit. One end of the circuit upon which these bells are secured is attached to the sounder of the bell on the alarmclock, and the other end is attached to the metallic portion of the clock proper.

(No modcLl It will be seen that by means of the cylinder 0 and washers P and Q the metallic portion of the clock proper is insulated from the sounding portion of the bell G, and therefore the circuitis open and none of the bells are sounded. Now, when the alarm-clock has reached the hour at which its alarm is set to strike, the hammer K will strike the sounding portion of the bell G, and will then strike the raised portion J on the cylinder H. Striking this latter 7 portion limits the stroke of the bell-hammer to such an extent that it stops its striking and the hammer rests against the raised portion J, thus closing the connection between the sounder G and the clock 0, and thus also completing the electric circuit through the series of bells. This of course immediately sets all of the bells in operation, and they will continue to ring until the circuit is broken.

The alarm-bell on" the clock is of the usual form and structure; but the plate J on the bell proper, standing out from the cylinder H of the bell, limits the stroke of the hammer K, so that when the hammer K strikes the piece J the hammer K does not have power or room enough to spring backward, and therefore it remains against the plate J and the circuit is closed, and all the bells on the line will continue to ring until they are switched off or the circuit broken. This compels the sleeping person or theperson controlling the device to approach the clock mechanism and by disconnecting some of the parts break the circuit. The hammer K can then be thrown away from the plate J and the device will be ready for operation again as soon as the hour for the automatic setting off of the alarm arrives. I

I claim 1. The combination of an alarm-clock and an insulated bell thereon, said bell having an invWard lug or elevated portion which engages the hammer and stops it, so as to close connection between the clock and the hell.

2. The combination of an electric circuit containing an electric bell, with an alarmclock and an insulated portion thereof, which engages and retains the hammer of the alarm mechanism, so as, when the alarm goes off, to close the circuit,and thus ring the electric bell.

EDWARD J. COLBY. 

